CN103037242A - Camera module test system - Google Patents
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Abstract
The invention provides a camera module test system. The camera module test system comprises a test plate, wherein the test plate comprises a receiving module, a display interface and at least one image processing device interface, wherein the receiving module is used for receiving image data transmitted by a camera module; the display interface is used for outputting the image data; and the image processing device interface is used for being connected with an image processing device to invoke an image processing module in the image processing device to perform image processing on the image data. The camera module test system can test image sensors with different output formats, realizes that an image displayed by the test system is basically consistent with an image displayed and shot by a platform of the camera module during actual use by invoking an ISP module of the image processing device, and guarantees the reliability of the test result. In addition, the link of transmitting high-speed data to a personal computer (PC) required by the traditional camera module test is reduced, so the camera module test system can guarantee that the image frame rate is not limited by a PC interface. The camera module test system can improve the test efficiency of the camera module, unifies the test and the using environment of the final product and improves the product quality.
Description
Technical field
The invention belongs to the imageing sensor field tests, especially a kind of high-pixel camera head mould group test macro.
Background technology
Along with the development of Digital image technology, camera has more and more become the equipment of various digital product indispensabilities, such as mobile phone, panel computer etc., and the camera up to the mega pixel level all is housed.The capital equipment of camera module comprises imageing sensor and camera lens, therefore, is very necessary for the test of image sensor chip and imageing sensor module.
Fig. 1 shows traditional camera testing system, and it mainly comprises camera module 101, test board 103, computer 105 etc.Comprise the imageing sensor 1011 that the RAW form is published picture in the camera module 101.Camera module 101 by digital visual interface (digital videoport, DVP) or mobile industry processor interface (Mobile Industry ProcessorInterface, MIPI) with image data transmission to test board 103.After test board 103 receives view data, transfer data to computer by USB or PCIE interface and show.The imageing sensor of publishing picture for the RAW form is because test board 103 as just the node of transfer of data, can't provide essential image processing algorithm, so the non-constant of the image effect that computer obtains affects the normal detection of module.
At present, the image sensor chip that some RAW form is published picture has added parts of images processing (ISP) module 1012, but 1012 of ISP modules are used when module detects or demonstrates, need to close in the time of normal the use, therefore this way has increased chip area and production cost undoubtedly, has caused larger waste.In order to save the ISP module, to reduce cost, the imageing sensor that the producer of some imageing sensor producers or test macro publishes picture for the RAW form provides the test board with the ISP module, but these test board versatilities are not strong, is difficult to be applicable to the image sensor chip of other producers.Brought a lot of inconvenience so just for the test of module factory.Because the ISP algorithm of the ISP algorithm of imageing sensor producer and cell phone platform is normally different, so the image of seeing on the image of seeing when module is tested and the mobile phone still has certain difference.
In addition, along with the increase of image sensor pixel number, consider cost and the application in later stage, the ISP module is built in the processor of application platform, such as the mobile phone master chip.Because the increase of pixel count, the data volume of transmission also significantly increase, the transmission speed of USB2.0 or PCIE interface can't satisfy the demands.Although in the test of camera module, can adopt high-speed interface, such as the USB3.0 interface, high-speed interface can bring unsteadiness to test macro, and the stable test macro with high-speed interface not yet occurs so far.
Summary of the invention
The present invention proposes a kind of camera module group test system, can be to imageing sensor, especially the RAW form imageing sensor of publishing picture is realized efficiently test.
The present inventor finds that the filter coating of the light-filtering glass that adopts in the conventional image sensor is to make by the mode of multiple physical vapour deposition.Be difficult to avoid ground, physical vapour deposition (PVD) can be introduced impurity particle in filter coating, thereby produces therein defective, and physical vapour deposition (PVD) repeatedly can further amplify this defective.Defective on the light-filtering glass can affect the imaging of image sensor chip.If defects count is too much, then the imageing sensor after the encapsulation can't use, and this has caused the packaging technology yield to descend, and causes cost of manufacture to increase.
The present invention proposes a kind of camera module group test system, comprise test board, described test board comprises be used to the receiver module of the view data that receives the transmission of described camera module, is used for display interface and at least one image processing apparatus interface of output image data; Wherein, described image processing apparatus interface is used for being connected with image processing apparatus, with the image processing module that calls in the described image processing apparatus described view data is carried out the image processing.
In one embodiment, described test board also comprises subscriber interface module, is used for receiving user's control command.So, the user can control the operation that test board carries out appointment.
In one embodiment, described user's control command comprises the instruction of the described image processing module of Selection and call, the instruction of closing image processing module.So, test macro when connecting a plurality of image processing apparatus, the image processing module that the user can the Selection and call appointment.When the image of camera module output yuv format, the user can the closing image processing module, so, has enlarged the range of application of test macro.
In one embodiment, described image processing apparatus interface is for supporting the interface of hot plug.So, when changing the camera module, can without shutdown test system, improve testing efficiency.
In one embodiment, described test board also comprises built-in or external storage device.So, test macro can carry out associative operation to the picture of storing in the built-in or external storage device, such as processing, analysis, preview, splicing.
In one embodiment, described test board links to each other with described camera module by communication interface, to control the work of described camera module.So, test macro can be controlled the switching of camera module under preview, shooting isotype.
In one embodiment, described test board also comprises security module, for detection of the operating state of described test board, to protect the internal circuit of described test board.Security module can provide the warning functions such as short circuit, electric current excess load, with the internal electronic element of protection test board.
In one embodiment, described image processing apparatus is the processor chips with image processing module.So, test macro can call the image processing module in the described processor chips, to process respective image.
In one embodiment, described test macro also comprises display device, is used for showing the image of described test macro output.So, need not to be connected to computer, test macro namely can be realized Presentation Function, has avoided test board and intercomputer because the transmission bottleneck that coffret causes.
In one embodiment, described test macro comprises that also described display interface links to each other by display module with described display device for the display module of vision signal conversion.When display device does not have with the corresponding interface of display interface, can realize the transmission of image by display module.
The present invention can test the imageing sensor of different output formats, and by calling the ISP module of image processing apparatus, realized that image and the actual image that uses the place platform to show and take of camera module that test macro shows are basically identical, guaranteed the confidence level of test result.Owing to reduced the transmitting high speed data of traditional camera module test needs to the link of PC, can guarantee that the image frame per second is not subjected to the restriction of PC interface.By the present invention, can improve the testing efficiency of camera module, and realize the unification of test and final products environment for use, Improving The Quality of Products.
Description of drawings
For more completely understand the disclosure with and advantage, now by reference to the accompanying drawings with reference to following description, wherein:
Fig. 1 shows the structure of existing camera module group test system;
Fig. 2 shows according to an embodiment of the invention camera testing system structure;
Fig. 3 shows according to an embodiment of the invention test board main modular;
Fig. 4 shows according to an embodiment of the invention system software architecture schematic diagram.
Unless indicate, otherwise the corresponding part of the general expression of the respective markers in the different accompanying drawing and symbol.The drafting accompanying drawing is the parties concerned for the execution mode that is shown clearly in present disclosure, and may not be drawn to scale.In order more to be shown clearly in some execution mode, after Reference numeral, may follow letter, the distortion of its indication same structure, material or process steps.
Embodiment
The below discusses enforcement and the use of embodiment in detail.Yet, should be appreciated that the specific embodiment of discussing only exemplarily illustrates enforcement and uses ad hoc fashion of the present invention, but not limit the scope of the invention.
Fig. 2 shows according to an embodiment of the invention camera testing system structure, and the camera module group test system comprises: camera module 201, test board 203, display module 205 and display device 207.
Wherein, the image sensor chip 2011 in the camera module 201 does not have the ISP module, is output as the image of RAW form.Camera module 201 links to each other by communication interface with test board 203 and communicates by letter, thereby test board 203 can be operated under preview or the shooting isotype by this communication interface control camera module 201.Above-mentioned communication interface includes but not limited to a kind of in I2C interface, the MIPI interface.
During work, image sensor chip 2011 is transferred to test board 203 with the RAW view data that detects by the corresponding interface.Test board 203 comprises the mobile phone master chip, like this then can utilize the related hardware of mobile phone master chip and the ISP algorithm in the calling mobile phone master chip, for example automatic exposure (AEC), Automatic white balance (AWB) scheduling algorithm, image to the RAW form that receives is processed, then the view data after will processing exports display module 205 to, and after the signal conversion through display module 205, image finally is shown on the display device 207.Above-mentioned the corresponding interface includes but not limited to a kind of in DVP interface, MIPI interface, the mobile display digital interface (Mobile Display Digital Interface, MDDI).
In this embodiment, test board 203 is exported the HDMI signals, and is converted to the VGA signal by display module 205, finally exports display device 207 to and shows.If display device 207 has had the HDMI interface, then can select to close display module 205, the HDMI signal that test board 203 is exported directly exports display device 207 to.
For setting forth in further detail test macro of the present invention, see also Fig. 3.
Fig. 3 shows according to an embodiment of the invention test board main modular, and test board 203 comprises central processing module 301, signal receiving module 303, display interface 305, subscriber interface module 307 and security module 309.
Wherein, signal receiving module 303 includes but not limited to a kind of in DVP interface, MIPI interface, the MDDI interface, is used for receiving the view data that is sent by camera module 201.Comprise at least one mobile phone master chip interface 3011 in the central processing module 301, be used for linking to each other with corresponding mobile phone master chip.Mobile phone master chip interface 3011 can also be for supporting the interface of hot plug.Be provided with the ISP module in the above-mentioned mobile phone master chip.Display interface 305 is used for providing outputing signal to display module 205.307 of subscriber interface modules are used for receiving user's control signals, such as the switch of power supply, system reset, pattern switching, Selection and call ISP module etc., thereby allow the user can control the operating state of test board 203.Security module 309 provides the warning functions such as short circuit, electric current excess load, so that the internal electronic element of protection test board 203.
During work, camera module 201 is with the image data transmission of the RAW form that the detects central processing module 301 to test board 203.If the mobile phone master chip interface of test board 203 has only connected a mobile phone master chip, then start this mobile phone master chip, and call the view data that ISP resume module wherein receives.If test board 203 comprises a plurality of mobile phone master chip interfaces 3011, and when being connected with a plurality of mobile phone master chips, can and call corresponding mobile phone master chip by user interface 307 selections, utilize the ISP module in this mobile phone master chip to process, obtain final image.Then, the final image that will process of test board 203 is sent to display device 207 by display interface 305 and shows.So, this test macro can carry out the camera module test of multiple mobile phone platform.
Owing to the ISP module that the processing of RAW view data has been adopted cell phone platform, the image that then shows on the image of test macro demonstration and the mobile phone screen is basically identical, thereby has guaranteed the confidence level of test result.
Fig. 4 shows according to an embodiment of the invention system software architecture schematic diagram.In application layer, present embodiment has comprised configuration, graphical analysis and the preview of ISP module/take pictures.Driving layer, then comprise LCD module, HDMI module, built-in memory module, external memory module, image collection module and hot plug module.
By the setting to application layer, can realize image preview, take pictures, or with the topography of a plurality of interested position, be spliced into the new image of a width of cloth, output to display device 207 and show.In addition, test macro also can be analyzed view data, thereby obtains the information such as modulation transfer function (Modulation Transfer Function, MTF), bad point, contamination of this image, and then the performance of evaluation camera module 201.By to driving the setting of layer, so that test board 203 can directly be exported the HDMI signal to the display device that is connected in test board 203, such as LCD display.Image collection module then can make test board 203 obtain image by the camera module.
By with upper module, test macro can read the built-in memory module that is stored in test macro or the image in the external memory module, perhaps obtain image by the camera module, then select corresponding ISP module by user interface 307, namely start corresponding mobile phone master chip, then utilize the ISP resume module image in this mobile phone master chip.Simultaneously, in test macro, camera module 101 can carry out hot plug operations, and then can batch testing camera module 101, has improved the efficient of test.In addition, because this test macro is the ISP module of directly using in the mobile phone master chip, so camera module 101 can use the different image sensor chip of different chip producers, make things convenient for module factory to test the chip of different chip producer.When needs were changed the camera module 101 of test, test macro can be by the hot plug module automatic search to new camera module to be measured, and finished the operation such as initialization, had guaranteed the fluency of test process.
When the imageing sensor in the camera module comprises the ISP module, the picture format of its output is YUV, do not need image is processed this moment, so can select not use ISP resume module image in the mobile phone master chip by user interface 307, directly the image with yuv format transfers to display device 207 by display interface 305.So, not only enlarge the scope of application of this test macro, also shortened the path of image data transmission, namely need not transfer to computer 103 and show, eliminated the demand to high-speed interface.
Above-mentioned mobile phone master chip only is that the embodiment of the invention is described, is not to limit range of application of the present invention.Those skilled in the art can replace with other with the image processing apparatus of ISP module with the mobile phone master chip according to prior art, or with the processor chips of ISP module.
Although in accompanying drawing and aforesaid description, illustrate in detail and described the present invention, should think that this is illustrated and describes is illustrative and exemplary, rather than restrictive; The invention is not restricted to above-mentioned execution mode.
The those skilled in the art of those the art can be by research specification, disclosed content and accompanying drawing and appending claims, and understanding and enforcement are to other changes of the execution mode of disclosure.In the claims, word " comprises " element and the step of not getting rid of other, and wording " one ", " one " are not got rid of plural number.In the practical application of invention, the function of a plurality of technical characterictics of quoting during a part possibility enforcement of rights requires.Any Reference numeral in the claim should not be construed as the restriction to scope.
Claims (10)
1. the test macro of a camera module comprises:
Test board, described test board comprise be used to the receiver module of the view data that receives the transmission of described camera module, are used for display interface and at least one image processing apparatus interface of output image data;
Wherein, described image processing apparatus interface is used for being connected with image processing apparatus, with the image processing module that calls in the described image processing apparatus described view data is carried out the image processing.
2. test macro as claimed in claim 1 is characterized in that, described test board also comprises subscriber interface module, is used for receiving user's control command.
3. test macro as claimed in claim 2 is characterized in that, described control command comprises the instruction of the described image processing module of Selection and call, the instruction of closing image processing module.
4. test macro as claimed in claim 1 is characterized in that, described image processing apparatus interface is for supporting the interface of hot plug.
5. test macro as claimed in claim 1 is characterized in that, described test board also comprises built-in or external storage device.
6. test macro as claimed in claim 1 is characterized in that, described test board links to each other with described camera module by communication interface, controls the mode of operation of described camera module.
7. test macro as claimed in claim 1 is characterized in that, described test board also comprises security module, for detection of the operating state of described test board, to protect the internal circuit of described test board.
8. such as each described test macro of claim 1 to 7, it is characterized in that described image processing apparatus is the processor chips with image processing module.
9. such as each described test macro of claim 1 to 7, it is characterized in that described test macro also comprises display device, be used for showing the image of described test macro output.
10. test macro as claimed in claim 9 is characterized in that, described test macro comprises that also described display interface links to each other by display module with described display device for the display module of vision signal conversion.
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| CN104349160A (en) * | 2014-09-17 | 2015-02-11 | 常熟实盈光学科技有限公司 | Method for checking MTF test brightness by exposure value Y of sensor |
| CN104601987A (en) * | 2015-02-03 | 2015-05-06 | 厦门狄耐克电子科技有限公司 | Measurement method and device of video frame rate of building visual intercom system |
| CN104661019A (en) * | 2015-01-12 | 2015-05-27 | 湖北三赢兴电子科技有限公司 | Automatic camera shooting module detection system |
| CN105141946A (en) * | 2015-08-10 | 2015-12-09 | 深圳市高斯贝尔家居智能电子有限公司 | System and method for testing monitoring camera |
| CN106713902A (en) * | 2016-11-24 | 2017-05-24 | 乐视控股（北京）有限公司 | Camera module fault detection method and apparatus, and terminal |
| CN106973286A (en) * | 2017-03-20 | 2017-07-21 | 上海与德科技有限公司 | The detection method of camera hardware circuit, apparatus and system |
| CN106993182A (en) * | 2017-03-17 | 2017-07-28 | 惠州凯珑光电有限公司 | A kind of dual camera detection means, system and method |
| CN107094224A (en) * | 2016-09-14 | 2017-08-25 | 格科微电子（上海）有限公司 | The manufacture method and terminal process equipment of camera module |
| CN107707905A (en) * | 2017-09-26 | 2018-02-16 | 惠州市德赛西威汽车电子股份有限公司 | A kind of multi-cam tests display system |
| CN108366253A (en) * | 2018-01-11 | 2018-08-03 | 福建联迪商用设备有限公司 | The test method and intelligent object of camera function |
| CN110493487A (en) * | 2019-08-22 | 2019-11-22 | 苏州浪潮智能科技有限公司 | A kind of data processing method, device and system |
| CN110753219A (en) * | 2018-07-24 | 2020-02-04 | 杭州海康威视数字技术股份有限公司 | Image sensor detection equipment |
| CN111045287A (en) * | 2017-08-08 | 2020-04-21 | 广东弘景光电科技股份有限公司 | Detection system of wide-angle camera module |
| CN114339040A (en) * | 2021-12-27 | 2022-04-12 | 浙江大华技术股份有限公司 | Focusing method and device applied to high-definition analog camera and storage medium |
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| CN104349160A (en) * | 2014-09-17 | 2015-02-11 | 常熟实盈光学科技有限公司 | Method for checking MTF test brightness by exposure value Y of sensor |
| CN104661019A (en) * | 2015-01-12 | 2015-05-27 | 湖北三赢兴电子科技有限公司 | Automatic camera shooting module detection system |
| CN104601987A (en) * | 2015-02-03 | 2015-05-06 | 厦门狄耐克电子科技有限公司 | Measurement method and device of video frame rate of building visual intercom system |
| CN104601987B (en) * | 2015-02-03 | 2015-10-28 | 厦门狄耐克电子科技有限公司 | The method of measurement of storied building visible intercommunication system video frame rate and device |
| CN105141946A (en) * | 2015-08-10 | 2015-12-09 | 深圳市高斯贝尔家居智能电子有限公司 | System and method for testing monitoring camera |
| CN107094224A (en) * | 2016-09-14 | 2017-08-25 | 格科微电子（上海）有限公司 | The manufacture method and terminal process equipment of camera module |
| CN107094224B (en) * | 2016-09-14 | 2021-06-18 | 格科微电子（上海）有限公司 | Manufacturing method of camera module and terminal processing equipment |
| CN106713902A (en) * | 2016-11-24 | 2017-05-24 | 乐视控股（北京）有限公司 | Camera module fault detection method and apparatus, and terminal |
| CN106993182A (en) * | 2017-03-17 | 2017-07-28 | 惠州凯珑光电有限公司 | A kind of dual camera detection means, system and method |
| CN106973286A (en) * | 2017-03-20 | 2017-07-21 | 上海与德科技有限公司 | The detection method of camera hardware circuit, apparatus and system |
| CN111045287A (en) * | 2017-08-08 | 2020-04-21 | 广东弘景光电科技股份有限公司 | Detection system of wide-angle camera module |
| CN111045287B (en) * | 2017-08-08 | 2021-08-24 | 广东弘景光电科技股份有限公司 | Detection system of wide-angle camera module |
| CN107707905A (en) * | 2017-09-26 | 2018-02-16 | 惠州市德赛西威汽车电子股份有限公司 | A kind of multi-cam tests display system |
| CN108366253A (en) * | 2018-01-11 | 2018-08-03 | 福建联迪商用设备有限公司 | The test method and intelligent object of camera function |
| CN108366253B (en) * | 2018-01-11 | 2020-01-31 | 福建联迪商用设备有限公司 | Camera function testing method and intelligent module |
| CN110753219A (en) * | 2018-07-24 | 2020-02-04 | 杭州海康威视数字技术股份有限公司 | Image sensor detection equipment |
| CN110493487A (en) * | 2019-08-22 | 2019-11-22 | 苏州浪潮智能科技有限公司 | A kind of data processing method, device and system |
| CN114339040A (en) * | 2021-12-27 | 2022-04-12 | 浙江大华技术股份有限公司 | Focusing method and device applied to high-definition analog camera and storage medium |
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